packagingExcludes configuration tag can be used to exclude certain files or directories from the war file.
It is important to put '/' character at the end of the directory to be excluded. If there is no such '/' character,
then the entry is interpreted as a regular file.

The talented DataExporter component of the PrimeFaces can be used to export data listed in
DataTable to various file formats, such as xls, pdf, csv and xml. Also, exportable attribute of
column component inside of DataTable, can be used to determine to whether the column is exported
to file or not. Well, what if we want to export a column without displaying on DataTable?
In this case, we can add: